CN113864176A - Plunger pump piston shoe pair dynamic pressure support detection device with pressure containing cavity - Google Patents
Plunger pump piston shoe pair dynamic pressure support detection device with pressure containing cavity Download PDFInfo
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- CN113864176A CN113864176A CN202110974015.8A CN202110974015A CN113864176A CN 113864176 A CN113864176 A CN 113864176A CN 202110974015 A CN202110974015 A CN 202110974015A CN 113864176 A CN113864176 A CN 113864176A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Reciprocating Pumps (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a plunger pump sliding shoe pair dynamic pressure support detection device with a pressure cavity, and relates to the technical field of hydraulic transmission axial plunger pump testing. The detection device mainly comprises a detection mechanism, a pressure oil source and a sensing acquisition array module. The detection mechanism mainly comprises a pressure containing cavity, a sliding shoe structure, a sensing matching grinding surface, a coupler and a driving motor: the sensing and collecting array module comprises an embedded pressure sensor array, an embedded displacement sensor array, an embedded friction sensor array and an embedded temperature sensor array. The detection device can realize the pressure working condition simulation of the oil film supporting state of the piston pump sliding shoe pair and realize the accurate measurement of the dynamic characteristic.
Description
Technical Field
The invention relates to the technical field of hydraulic transmission axial plunger pump testing, in particular to a plunger pump piston shoe pair dynamic pressure support detection device with a pressure cavity.
Background
The axial plunger pump is a power source in a hydraulic system, is one of core power elements in the hydraulic field, and is widely applied to the fields of machining, transportation, aerospace and the like due to the advantages of small volume, convenience in flow control, long service life and the like. The sliding shoe pair oil film of the axial plunger pump is a key structure influencing the service life of the axial plunger pump, the sliding shoe pair structure has gap oil film support, and the quality of the bearing characteristic directly determines the reliability of the sliding shoe structure of the plunger pump, so that the method has important research significance for measuring the bearing characteristic of the sliding shoe pair structure of the plunger pump. At present, the research aiming at the piston shoe pair of the plunger pump does not have a quantitative analysis method aiming at the gap thickness, and the simulation aiming at the actual operation condition of the plunger pump is not real, so that a device for measuring the bearing characteristic of the piston shoe pair capable of effectively simulating the actual operation condition of the plunger pump needs to be designed.
Disclosure of Invention
In order to overcome the practical problem that quantitative detection of the bearing characteristic of a piston shoe pair of a high-pressure plunger pump is difficult, the invention provides a piston pump piston shoe pair dynamic pressure support detection device with a pressure cavity.
The invention aims to realize the working condition simulation and the bearing characteristic measurement of a high-pressure plunger pump sliding shoe pair, and is realized by the following technical scheme:
the invention provides a plunger pump piston shoe auxiliary dynamic pressure support detection device with a pressure cavity, which comprises a detection mechanism and a sensing acquisition array module, wherein the detection mechanism comprises a pressure cavity and a pressure cavity;
wherein, detection mechanism includes pressure chamber, piston shoe structure, sensing match grinding face, shaft coupling, driving motor, oil tank oil source and holds chamber pressure oil source: the driving motor is coaxially connected with the sensing matching and grinding surface through the coupler, and the sensing matching and grinding surface and the sliding shoe structure are coaxially arranged in the pressure containing cavity; the pressure cavity is provided with an oil inlet communicated with a cavity pressure oil source and an oil outlet communicated with an oil tank oil source;
the sensing and collecting array module comprises an embedded pressure sensor array, an embedded displacement sensor array, an embedded friction sensor array and an embedded temperature sensor array: the embedded pressure sensor array comprises two lines of linear pressure sensor arrays which are perpendicular to each other and pass through the circle center of the sensing matching grinding surface, and each line of linear pressure sensor array comprises a plurality of pressure sensors which are distributed at equal intervals;
the embedded displacement sensor array comprises two lines of linear displacement sensor arrays which are perpendicular to each other and pass through the circle center of the sensing matching and grinding surface, and each line of linear displacement sensor array comprises a plurality of displacement sensors which are distributed at equal intervals; the embedded displacement sensor array and the embedded pressure sensor array are arranged adjacently;
the embedded friction force sensor array is composed of two lines of linear friction force sensor arrays which are perpendicular to each other and pass through the circle center of the sensing matching grinding surface, and each line of linear friction force sensor array comprises a plurality of friction force sensors which are distributed at equal intervals; the embedded friction sensor array and the embedded pressure sensor array are separated by 45 degrees;
all temperature sensors in the embedded temperature sensor array are uniformly arranged on the sensing wear surface in the circumferential direction, and all temperature sensors in the embedded temperature sensor array are arranged at the interval between the embedded pressure sensor array and the embedded friction force sensor array.
Preferably, the pressure containing cavity is a pressure-resistant containing cavity, and the pressure of the containing cavity is controlled by a containing cavity pressure oil source.
Preferably, the slipper structure can perform translational motion along the axial direction, so that the clearance dimension of the friction pair can be adjusted.
Preferably, the sensors in the embedded pressure sensor array, the embedded displacement sensor array, the embedded friction sensor array and the embedded temperature sensor array may be wireless communication sensors or wired communication sensors.
Preferably, the slipper structure is a through structure, and the inlet pressure of a slipper pair oil film is ensured to be consistent with the actual working condition of the plunger pump by connecting a plunger pressure simulation oil source.
Preferably, a through hole for sensor wiring is formed in the center of the sensing match grinding surface.
Preferably, the coupler is provided with a wireless data acquisition chip, the wire harness of each sensor is routed through a central through hole of the grinding surface and integrally installed on the wireless data acquisition chip on the coupler, and the wireless data acquisition chip is in data communication with the upper computer through a wireless communication module.
The invention has the beneficial effects that:
1. the plunger pump sliding shoe pair dynamic pressure support detection device with the pressure containing cavity can simulate the pressure environment of real work of a sliding shoe pair gap oil film, and the detection of the bearing characteristic is more accurate.
2. The detection module is provided with an embedded pressure sensor array, an embedded displacement sensor array, an embedded friction force sensor array and an embedded temperature sensor array, and can visually and effectively reproduce the dynamic change characteristic of the friction pair gap.
3. The thickness of the friction pair gap is adjustable, and quantitative analysis of a gap oil film can be achieved.
Drawings
The invention is further described with reference to the following figures and examples.
FIG. 1 is a cross-sectional view of the apparatus;
FIG. 2 is a view showing the structure of the apparatus;
FIG. 3 is a block diagram of a sensor acquisition array module;
in the figure, a plunger pressure simulation oil source 1, a sliding shoe structure 2, a pressure containing cavity 3, a sensing wear-matching surface 4, a coupling 5, a driving motor 6, an oil tank oil source 7, a containing cavity pressure oil source 8, an embedded temperature sensor array 9, an embedded friction force sensor array 10, an embedded pressure sensor array 11 and an embedded displacement sensor array 12.
Detailed Description
The invention, which is further described below with reference to the accompanying drawings and specific examples, may be embodied in many different forms of embodiments and should not be construed as limited to the embodiments set forth herein.
As shown in fig. 1 to 3, the device for detecting the dynamic pressure support of the plunger pump shoe pair with the pressure cavity includes a detection mechanism and a sensing acquisition array module.
As shown in fig. 1-2, the detection mechanism includes a pressure chamber 3, a slipper structure 2, a sensing wear surface 4, a coupling 5, a driving motor 6, an oil tank oil source 7 and a chamber pressure oil source 8: the driving motor is coaxially connected with the sensing matching grinding surface 4 through the coupler 5, and the sensing matching grinding surface 4 and the sliding shoe structure 2 are coaxially arranged in the pressure containing cavity 3; an oil inlet communicated with a cavity pressure oil source 8 and an oil outlet communicated with an oil tank oil source 7 are formed in the pressure cavity 3;
as shown in fig. 3, the sensing and collecting array module includes an embedded pressure sensor array 11, an embedded displacement sensor array 12, an embedded friction sensor array 10, and an embedded temperature sensor array 9: the embedded pressure sensor array 11 comprises two lines of linear pressure sensor arrays which are perpendicular to each other and pass through the circle center of the sensing and grinding surface, and each line of linear pressure sensor array comprises a plurality of pressure sensors which are distributed at equal intervals;
the embedded displacement sensor array 12 comprises two lines of linear displacement sensor arrays which are perpendicular to each other and pass through the circle center of the sensing and grinding surface, and each line of linear displacement sensor array comprises a plurality of displacement sensors which are distributed at equal intervals; the embedded displacement sensor array 12 is arranged adjacent to the embedded pressure sensor array;
the embedded friction force sensor array 10 is composed of two lines of linear friction force sensor arrays which are perpendicular to each other and pass through the circle center of the sensing and grinding surface, and each line of linear friction force sensor array comprises a plurality of friction force sensors which are distributed at equal intervals; the embedded friction sensor array 10 and the embedded pressure sensor array 11 are separated by 45 degrees;
all temperature sensors in the embedded temperature sensor array 9 are uniformly arranged on the sensing wear surface in the circumferential direction, and all temperature sensors in the embedded temperature sensor array 9 are arranged at intervals between the embedded pressure sensor array and the embedded friction sensor array.
The invention provides a test method of a detection mechanism with a pressure cavity, which comprises the following steps of:
the sensing matching grinding surface 4 is dragged by the driving motor 6 to simulate the self-rotation motion of the sliding shoe in the pump; the sensing and grinding surface is used for simulating a swash plate; when the detection mechanism works, the sliding shoe structure 2 is in a fixed state, and the sensing matched grinding surface rotates; a plunger pressure simulation oil source 1(P1) is arranged at the center of the sliding shoe structure 2; the pressure oil of the plunger pressure simulation oil source P1 is the same as and adjustable in pressure in the plunger cavity of the plunger pump, so that the real pressure working condition of the plunger cavity can be simulated; the front end and the rear end of the pressure cavity are respectively provided with an oil outlet T, a T port is connected with an oil source 7 of an oil tank and used for adjusting the pressure in the cavity, and the T port can be closed when the pressure of the cavity is required to keep high pressure; and the cavity pressure oil source 8(P2) is used for adjusting the pressure working condition of the gap between the sensing wear surface and the sliding shoe structure and is used as the boundary pressure of the gap leakage. P1, P2 and T are independent constant pressure oil sources, wherein the pressure of P1 is equal to the plunger pump outlet set pressure, the pressure of P2 is equal to the plunger pump casing pressure, and T is the oil tank pressure. Since the slipper is moving and there is a clearance seal, the communication between P1 and P2 does not affect the pressure regulation of the respective oil sources. The two T-shaped ports are also communicated, and because the gap between the sliding shoe and the wall surface is sealed, the two T-shaped ports can avoid the pressure building phenomenon.
The sensing is joined in marriage the mill flour and is regarded as the important structure of data acquisition and detection, its surface embedded installs temperature sensor array 9, frictional force sensor array 10, pressure sensor array 11 and displacement sensor array 12, wherein temperature sensor is film formula temperature sensor, frictional force sensor and pressure sensor are flexible resistance film pressure sensor, displacement sensor adopts hall displacement sensor, all can realize miniaturization and embedded installation, the pencil of sensor is walked the line through the central through-hole of joining in marriage the mill flour, and with its integration in the wireless data acquisition chip of installing on the shaft coupling, through wireless communication module, with sensor data transmission to the host computer. The characteristics of a 360-degree temperature field, a thickness field and a pressure field of the sliding shoe pair can be established under laboratory conditions through the data acquisition array of the sensing matching and grinding surface, and the influence of oil liquid characteristics and pressure characteristics on the friction force of the friction pair is analyzed.
By applying the embodiment of the application, the dynamic characteristic detection, the working condition simulation and the quantitative analysis of the piston pump sliding shoe pair oil film can be realized under the real pressure working condition, the multi-element sensing characteristic of the sensing acquisition array module can acquire the real-time state of the friction pair oil film, and the method is a detection means for realizing the friction pair oil film bearing mechanism analysis.
Claims (7)
1. A plunger pump piston shoe pair dynamic pressure support detection device with a pressure cavity is characterized by comprising a detection mechanism and a sensing acquisition array module;
the detection mechanism comprises a pressure containing cavity (3), a sliding shoe structure (2), a sensing and grinding surface (4), a coupler (5), a driving motor (6), an oil tank oil source (7) and a containing cavity pressure oil source (8): the driving motor is coaxially connected with the sensing matching grinding surface (4) through a coupler (5), and the sensing matching grinding surface (4) and the sliding shoe structure (2) are coaxially arranged in the pressure containing cavity (3); an oil inlet communicated with the cavity pressure oil source (8) and an oil outlet communicated with the oil tank oil source (7) are formed in the pressure cavity (3);
the sensing and collecting array module comprises an embedded pressure sensor array (11), an embedded displacement sensor array (12), an embedded friction sensor array (10) and an embedded temperature sensor array (9): the embedded pressure sensor array (11) comprises two lines of linear pressure sensor arrays which are perpendicular to each other and pass through the circle center of the sensing matching and grinding surface, and each line of linear pressure sensor array comprises a plurality of pressure sensors which are distributed at equal intervals;
the embedded displacement sensor array (12) comprises two lines of linear displacement sensor arrays which are perpendicular to each other and pass through the circle center of the sensing and grinding surface, and each line of linear displacement sensor array comprises a plurality of displacement sensors which are distributed at equal intervals; the embedded displacement sensor array (12) is arranged adjacent to the embedded pressure sensor array;
the embedded friction force sensor array (10) is composed of two lines of linear friction force sensor arrays which are perpendicular to each other and pass through the circle center of the sensing matching grinding surface, and each line of linear friction force sensor array comprises a plurality of friction force sensors which are distributed at equal intervals; the embedded friction sensor array (10) and the embedded pressure sensor array (11) are separated by 45 degrees;
all temperature sensors in the embedded temperature sensor array (9) are uniformly arranged on the sensing wear surface in the circumferential direction, and all temperature sensors in the embedded temperature sensor array (9) are arranged at the interval between the embedded pressure sensor array and the embedded friction force sensor array.
2. The device for detecting the auxiliary dynamic pressure support of the piston shoe of the plunger pump with the pressure containing cavity as claimed in claim 1, wherein the pressure containing cavity (3) is a pressure-resistant containing cavity, and the pressure of the containing cavity is controlled by a containing cavity pressure oil source (8).
3. The device for detecting the dynamic pressure support of the piston shoe pair of the plunger pump with the pressure cavity as claimed in claim 1, wherein the piston shoe structure (2) can perform translational motion along the axial direction to realize the adjustment of the gap dimension of the friction pair.
4. The device for detecting the dynamic pressure support of the piston shoe pair of the plunger pump with the pressure cavity as claimed in claim 1, wherein the sensors in the embedded pressure sensor array, the embedded displacement sensor array, the embedded friction sensor array and the embedded temperature sensor array can be wireless communication sensors or wired communication sensors.
5. The device for detecting the dynamic pressure support of the piston shoe pair of the plunger pump with the pressure cavity as claimed in claim 1, wherein the piston shoe structure is a through structure, and the inlet pressure of the oil film of the piston shoe pair is ensured to be consistent with the actual working condition of the plunger pump by connecting a plunger pressure simulation oil source (1).
6. The device for detecting the dynamic pressure support of the plunger pump shoe pair with the pressure cavity as claimed in claim 1, wherein a through hole for routing a sensor is formed in the center of the sensing wear surface.
7. The device for detecting the dynamic pressure support of the piston shoe pair of the plunger pump with the pressure cavity as claimed in claim 6, wherein a wireless data acquisition chip is arranged on the coupler, the wiring harness of each sensor is routed through the central through hole of the wear surface and is integrally mounted on the wireless data acquisition chip on the coupler, and the wireless data acquisition chip is in data communication with an upper computer through a wireless communication module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110974015.8A CN113864176B (en) | 2021-08-24 | 2021-08-24 | Plunger pump piston shoe pair dynamic pressure support detection device with pressure containing cavity |
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| CN202110974015.8A CN113864176B (en) | 2021-08-24 | 2021-08-24 | Plunger pump piston shoe pair dynamic pressure support detection device with pressure containing cavity |
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| CN113864176A true CN113864176A (en) | 2021-12-31 |
| CN113864176B CN113864176B (en) | 2023-01-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116398416A (en) * | 2023-03-28 | 2023-07-07 | 浙江大学 | Plunger pair performance simulation test device, temperature control system and hydraulic system |
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| CN116398416B (en) * | 2023-03-28 | 2024-01-30 | 浙江大学 | Plunger pair performance simulation test device, temperature control system and hydraulic system |
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